The solubility of hydrogen in plutonium in the temperature range 475 to 825 degrees centigrade

Technical Report · Tue Jan 01 04:00:00 EST 1991

DOI:https://doi.org/10.2172/6291865· OSTI ID:6291865

Allen, T H

The solubility of hydrogen (H) in plutonium metal (Pu) was measured in the temperature range of 475 to 825{degree}C for unalloyed Pu (UA) and in the temperature range of 475 to 625{degree}C for Pu containing two-weight-percent gallium (TWP). For TWP metal, in the temperature range 475 to 600{degree}C, the saturated solution has a maximum hydrogen to plutonium ration (H/Pu) of 0.00998 and the standard enthalpy of formation ({Delta}H{degree}{sub f(s)}) is (-0.128 {plus minus} 0.0123) kcal/mol. The phase boundary of the solid solution in equilibrium with plutonium dihydride (PuH{sub 2}) is temperature independent. In the temperature range 475 to 625{degree}C, UA metal has a maximum solubility at H/Pu = 0.011. The phase boundary between the solid solution region and the metal+PuH{sub 2} two-phase region is temperature dependent. The solubility of hydrogen in UA metal was also measured in the temperature range 650 to 825{degree}C with {Delta}H{degree}{sub f(s)} = (-0.104 {plus minus} 0.0143) kcal/mol and {Delta}S{degree}{sub f(s)} = 0. The phase boundary is temperature dependent and the maximum hydrogen solubility has H/Pu = 0.0674 at 825{degree}C. 52 refs., 28 figs., 9 tabs.

• Research Organization: EG and G Rocky Flats, Inc., Golden, CO (USA). Rocky Flats Plant
• Sponsoring Organization: DOE/DP
• DOE Contract Number: AC34-90DP62349; AC04-76DP03533
• OSTI ID: 6291865
• Report Number(s): RFP-4456; ON: DE91006410
• Country of Publication: United States
• Language: English

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ACTINIDES
ADSORPTION
DIAGRAMS
DISSOLUTION
ELEMENTS
FLUIDS
GALLIUM
HIGH TEMPERATURE
HYDROGEN
ISOTHERMS
LIQUIDS
METALS
NONMETALS
PHASE DIAGRAMS
PHYSICAL PROPERTIES
PLUTONIUM
SOLUBILITY
SORPTION
THERMODYNAMICS
TRANSURANIUM ELEMENTS